Question & Answer (please send me email If you have any questions)Q1：What should I do if the power bank breaks down during use? Does it have a warranty?A: Each product has a 1-month warranty period, you can contact the seller in case of equipment failure, and the seller will help you solve these problems. Q2：How many outputs & inputs do this power bank have?A: 3 cables outputs + 1 power cable input,3 input ports for chargingQ3：How do I charge this power bank?A: The power bank has built-in USB input cable and Micro/Type-C input ports.we recommend charging with the built-in USB input cable because very convenient.Q4：Which mobile phones and devices are compatible with this power bank?A: Because the output of the power bank is USB C, so it is basically compatible with all mobile phones and devices in the market, whether it is iPhone iPad Android Samsung Galaxy and HuaweiP40.Q5：How many times can this 10000mAh power bank charge my mobile phone? A: iPhone,SAMSUNG,Nokia,iPad and more than 90% electronic devices (different device conversion rate is different,also different using environments will affect the number of charging. ) usually for mobile phone recharge is 2-2.5 times.Q6: How long does it take to fully recharge the power bank?A: It takes about 2-4 hours for fully recharge with a 2.1A charger.